Alert archive / Arkansas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 800, NWS Little Rock, AR
NWS Little Rock, AR issued this severe thunderstorm warning at Aug 8, 2011, 6:56 PM CDT for Boone County, Arkansas. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 8, 2011, 6:56 PM CDT (23:56 UTC)
- Expired
- Aug 8, 2011, 7:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
County Boone County, AR
The radar
The Springfield radar (KSGF), 107 km from the middle of the area, began a volume at 23:57 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 11.9 hours before the alert went out and 91 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 107 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 1571 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -115 m²/s²
- 0-3 km storm-relative helicity
- -24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Little Rock, AR wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 8, 6:38 PM CDT, 18 minutes earlier.
Area forecast discussion, Aug 8, 6:38 PM CDT, 18 minutes before
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</html>Hazardous weather outlook, Aug 8, 4:15 AM CDT, 14 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LITTLE ROCK AR 415 AM CDT MON AUG 8 2011 ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-091000- ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND- CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING- INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE- MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE- PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE- WOODRUFF-YELL- 415 AM CDT MON AUG 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS MORNING ACROSS NORTHERN SECTIONS OF ARKANSAS AS ONGOING THUNDERSTORM ACTIVITY ACROSS SOUTHWEST MISSOURI MOVES SOUTHEAST TOWARDS ARKANSAS. SIGNIFICANT SEVERE WEATHER IS NOT EXPECTED WITH THE STORMS ACROSS NORTHERN ARKANSAS THIS MORNING DUE TO LIMITED INSTABILITY. HOWEVER...AN ISOLATED STRONG TO SEVERE STORM WILL BE POSSIBLE. LATER THIS AFTERNOON...SHOWERS AND THUNDERSTORMS WILL AGAIN BE POSSIBLE ACROSS THE STATE...AS STORMS DEVELOP ALONG OR NEAR ANY OUTFLOW BOUNDARIES DURING THE HEAT OF THE AFTERNOON. ANY STORM THAT DOES FORM COULD BECOME SEVERE...WITH DAMAGING WINDS THE MAIN THREAT. LOCALLY HEAVY RAINFALL AND HAIL WILL ALSO BE POSSIBLE. HOT TEMPERATURES WILL ONCE AGAIN BE SEEN THIS AFTERNOON AS AFTERNOON HIGHS WARM TO THE UPPER 90S TO AROUND 105. HEAT INDICES WILL RANGE FROM 105 TO 114 DEGREES ACROSS THE SOUTHERN TWO THIRDS OF ARKANSAS. A HEAT ADVISORY REMAINS IN EFFECT THROUGH THIS EVENING...GENERALLY ALONG AND SOUTH OF A LINE FROM CLARKSVILLE...TO GREENBRIER...TO BATESVILLE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE TUESDAY INTO TUESDAY NIGHT AS AN UPPER LEVEL DISTURBANCE MOVES OVERHEAD...AND COLD FRONT PUSHES SOUTH ACROSS THE STATE. SOME STORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE...WITH DAMAGING WINDS AND LARGE HAIL THE POSSIBLE THREATS. OTHER UPPER LEVEL DISTURBANCES WILL PASS OVER THE REGION LATER THIS WEEK INTO THE WEEKEND IN NORTHWEST FLOW ALOFT. THIS SETUP WILL KEEP SHOWERS AND THUNDERSTORMS IN THE FORECAST...SOME OF WHICH WILL HAVE THE POTENTIAL TO BECOME SEVERE. WITH SEVERAL DISTURBANCES EXPECTED TO MOVE OVER THE REGION IN THE COMING DAYS...SOME LOCATIONS ACROSS THE STATE COULD SEE LOCALLY HEAVY RAINFALL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AS WIDESPREAD SEVERE WEATHER IS NOT ANTICIPATED AT THIS TIME. && VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND CLICK ON CENTRAL ARKANSAS. 62
In the hours before
Special weather statement, Aug 8, 2:12 PM CDT, 4 hours 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LITTLE ROCK AR 212 PM CDT MON AUG 8 2011 ARZ044-045-081940- LONOKE AR-PULASKI AR- 212 PM CDT MON AUG 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PULASKI AND EXTREME WESTERN LONOKE COUNTIES UNTIL 245 PM CDT... AT 207 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR CAMP ROBINSON...OR NEAR N LITTLE ROCK ARPT...MOVING EAST AT 10 MPH. SMALL HAIL FROM PEA UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 45 MPH ARE EXPECTED WITH THIS STORM. HEAVY RAIN AND DANGEROUS LIGHTNING ARE ALSO POSSIBLE. * LOCATIONS IMPACTED INCLUDE... SHERWOOD... N LITTLE ROCK ARPT... NORTH LITTLE ROCK... JACKSONVILLE... SYLVAN HILLS... PROTHRO JUNCTION... MCALMONT... LEVY... LAKEWOOD... GRAVEL RIDGE... CAMP ROBINSON... BURNS PARK... ARGENTA... KERR... GALLOWAY... CAMMACK VILLAGE... VALENTINE... THE HEIGHTS... THIS INCLUDES INTERSTATE 30 BETWEEN MILE MARKERS 141 AND 142. THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 147 AND 164. THIS INCLUDES INTERSTATE 440 BETWEEN MILE MARKERS 9 AND 14. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. LAT...LON 3490 9206 3475 9206 3475 9235 3485 9235 TIME...MOT...LOC 1911Z 267DEG 9KT 3482 9229 59
Local storm report, Aug 8, 3:12 PM CDT, 3 hours 44 minutes before
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</html>Local storm report, Aug 8, 4:14 PM CDT, 2 hours 42 minutes before
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</html>Local storm report, Aug 8, 4:52 PM CDT, 2 hours 4 minutes before
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</html>Local storm report, Aug 8, 6:03 PM CDT, 53 minutes before
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</html>The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:12 PM CDT | Special Weather Statement | LZK | Pulaski | 28 min |
| Aug 8, 2:55 PM CDT | Severe Thunderstorm Warning | LZK | Lonoke, Prairie, White | 35 min |
| Aug 8, 3:32 PM CDT | Special Weather Statement | LZK | White | 43 min |
| Aug 8, 3:39 PM CDT | Severe Thunderstorm Warning | LZK | White | 36 min |
| Aug 8, 3:51 PM CDT | Severe Thunderstorm Warning | LZK | White | 24 min |
| Aug 8, 3:52 PM CDT | Severe Thunderstorm Warning | LZK | Newton | 38 min |
| Aug 8, 4:09 PM CDT | Severe Thunderstorm Warning | LZK | White, Woodruff | 36 min |
| Aug 8, 4:30 PM CDT | Severe Thunderstorm Warning | LZK | Newton, Pope, Searcy | 24 min |
| Aug 8, 4:46 PM CDT | Severe Thunderstorm Warning | LZK | Cleburne, Faulkner, Van Buren, White | 44 min |
| Aug 8, 5:01 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Pope, Van Buren | 44 min |
| Aug 8, 5:30 PM CDT | Severe Thunderstorm Warning | LZK | Faulkner, White | 30 min |
| Aug 8, 5:36 PM CDT | Severe Thunderstorm Warning | LZK | Van Buren | 39 min |
| Aug 8, 6:14 PM CDT | Severe Thunderstorm Warning | LZK | Conway, Faulkner | 31 min |
| Aug 8, 6:29 PM CDT | Severe Thunderstorm Warning | LZK | Pulaski | 31 min |
| Aug 8, 6:54 PM CDT | Severe Thunderstorm Warning | LZK | Faulkner, Lonoke, Pulaski, White | 36 min |
Nearby
Severe Thunderstorm Warnings in Arkansas, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.